The Orion Uncertain Data Management System

Orion is a state-of-the-art uncertain database management system that extends the relational model to include probabilistic uncertain data as first call data types. This demonstration presents an implementation of this system as an extension of PostgreSQL. The Orion model is capable of supporting both attribute and tuple uncertainty with arbitrary correlations. Both discrete and continuous pdfs are handled in a natural and accurate manner. The system uses standard SQL with only minimal modifications. The undelying model is consistent with Possible Worlds Semantics. We demonstrate the working of Orion and how it simplifies the design and enhances the capabilities of two sample applications: managing sensor data (continuous uncertainty) and inferring missing values (discrete uncertainty).